blood group

Images & Videos

Close-up illustration of multiple human red blood cells with their characteristic disc shape, floating against a red background.

Gloved hands hold a blood sample tube above a rack of vials in a laboratory, illustrating blood analysis in human body science.

Close-up of a medical blood bag filled with red blood, showing attached tubes and connectors against a blurred background.

blood group: Media

medicine

Videos

Gloved hands hold a blood sample tube above a rack of vials in a laboratory, illustrating blood analysis in human body science.

How Much Blood is in the Human Body?

And how much do you really need?

Video: Encyclopædia Britannica, Inc.

Close-up of a medical blood bag filled with red blood, showing attached tubes and connectors against a blurred background.

Why Is Blood Red?

Are you “red-y” to find out?

Video: Encyclopædia Britannica, Inc.

Images

Close-up illustration of multiple human red blood cells with their characteristic disc shape, floating against a red background.

Red blood cells

The major component of human blood is the red blood cell.

© Studio29ro/Dreamstime.com

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